MAC7200 datasheet(492/976 Pages) FREESCALE

492 / 976 page

Introduction

MAC7200 Microcontroller Family Reference Manual, Rev. 2

414

Freescale Semiconductor

Figure 23-1. Block diagram of CRG

23.1.3

Features

The main features of this block are:

•

Phase Locked Loop (PLL) frequency multiplier

— Reference divider

— Automatic bandwidth control mode for low-jitter operation

— Automatic frequency lock detector

— CPU interrupt on entry or exit from locked condition

— Self Clock Mode in absence of reference clock

•

System Clock Generator

— Clock Quality Check

— User selectablefast wake-up from Stop in Self-Clock Mode for power saving and immediate

program execution

— Clock switch for either Oscillator or PLL based system clocks

CRG

Registers

Clock and Reset

RESET

PLL

XFC

VDDPLL

VSSPLL

Oscillator

EXTAL

XTAL

Control

System Clock

System Reset

Oscillator Clock

PLLCLK

OSCCLK

Clock

Monitor

CM fail

Clock Quality

Checker

Reset

Generator

XCLKS

Power on Reset

Low Voltage Reset 1

1) Refer to device specification for availability

of the low voltage reset feature.

Real Time Interrupt

PLL Lock Interrupt

Self Clock Mode

Interrupt

Voltage

Regulator

RTI Clock

SWT Clock

Peripheral Bus Clock

MAC7200 Datasheet(PDF) 492 Page - Freescale Semiconductor, Inc

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